oxygengine_input_device_web/
keyboard.rs

1use backend::closure::WebClosure;
2use core::{ecs::Universe, Scalar};
3use input::device::InputDevice;
4use std::{any::Any, cell::RefCell, collections::HashSet, rc::Rc};
5use wasm_bindgen::{prelude::*, JsCast};
6use web_sys::*;
7
8/// (key character, code)
9pub type KeyCode = (char, String);
10
11pub struct WebKeyboardInputDevice {
12    element: EventTarget,
13    keys: Rc<RefCell<HashSet<String>>>,
14    sequence: Rc<RefCell<Vec<KeyCode>>>,
15    last_sequence: Vec<KeyCode>,
16    key_down_closure: WebClosure,
17    key_up_closure: WebClosure,
18}
19
20unsafe impl Send for WebKeyboardInputDevice {}
21unsafe impl Sync for WebKeyboardInputDevice {}
22
23impl WebKeyboardInputDevice {
24    pub fn new(element: EventTarget) -> Self {
25        Self {
26            element,
27            keys: Default::default(),
28            sequence: Rc::new(RefCell::new(Vec::with_capacity(128))),
29            last_sequence: Vec::with_capacity(128),
30            key_down_closure: Default::default(),
31            key_up_closure: Default::default(),
32        }
33    }
34
35    pub fn last_sequence(&self) -> &[KeyCode] {
36        &self.last_sequence
37    }
38}
39
40impl InputDevice for WebKeyboardInputDevice {
41    fn name(&self) -> &str {
42        "keyboard"
43    }
44
45    fn on_register(&mut self) {
46        {
47            let keys = self.keys.clone();
48            let sequence = self.sequence.clone();
49            let closure = Closure::wrap(Box::new(move |event: KeyboardEvent| {
50                let code = event.code();
51                let key = event.key();
52                keys.borrow_mut().insert(code.clone());
53                match key.len() {
54                    1 => sequence
55                        .borrow_mut()
56                        .push((key.chars().next().unwrap(), code)),
57                    2..=std::usize::MAX => sequence.borrow_mut().push((0 as char, code)),
58                    _ => {}
59                }
60            }) as Box<dyn FnMut(_)>);
61            self.element
62                .add_event_listener_with_callback("keydown", closure.as_ref().unchecked_ref())
63                .unwrap();
64            self.key_down_closure = WebClosure::acquire(closure);
65        }
66        {
67            let keys = self.keys.clone();
68            let closure = Closure::wrap(Box::new(move |event: KeyboardEvent| {
69                keys.borrow_mut().remove(&event.code());
70            }) as Box<dyn FnMut(_)>);
71            self.element
72                .add_event_listener_with_callback("keyup", closure.as_ref().unchecked_ref())
73                .unwrap();
74            self.key_up_closure = WebClosure::acquire(closure);
75        }
76    }
77
78    fn on_unregister(&mut self) {
79        self.key_down_closure.release();
80        self.key_up_closure.release();
81    }
82
83    fn process(&mut self, _: &mut Universe) {
84        self.last_sequence.clear();
85        self.last_sequence.append(&mut self.sequence.borrow_mut());
86    }
87
88    fn query_axis(&self, name: &str) -> Option<Scalar> {
89        Some(if self.keys.borrow().contains(name) {
90            1.0
91        } else {
92            0.0
93        })
94    }
95
96    fn query_trigger(&self, name: &str) -> Option<bool> {
97        Some(self.keys.borrow().contains(name))
98    }
99
100    fn query_text(&self) -> Option<String> {
101        Some(self.last_sequence.iter().map(|(c, _)| c).collect())
102    }
103
104    fn as_any(&self) -> &dyn Any {
105        self
106    }
107}
oxygengine_input_device_web/keyboard.rs

oxygengine_input_device_web/
keyboard.rs
